That's why the Old Sea Dogs always brought along Mr. Prostitute.
Woman Onboard a Ship Will Bring Bad Luck.
“Looking for comfort at sea, sailors have a long standing tradition of being superstitious. One of these traditions is that having a woman on the ship will bring bad luck to the ship and it’s voyage. One article stated, that sailors once believed that having a woman on board a ship would anger the gods of the sea. This would bring about violent waves and disastrous weather conditions. It is believed that in rare cases, woman were sometimes thrown from the ship to seek the forgiveness of the gods.”
http://www.pseudoparanormal.com/2011/04/woman-onboard-ship-will-bring-bad-luck.html
That's why the Old Sea Dogs always brought along Mr. Prostitute.